Martin Blackwood is one of the researchers working for the Magnus Institute and has worked for the Institute since at least 2002 (MAG 10). He helps Jonathan Sims by following up on the Archive's cases. Initially Sims does not appear to value his services, saying he will contribute "nothing but delays".
Martin is a little claustrophobic (MAG 15).
Martin looked into any mention of the book Ex Altiora, but found no records (MAG 4).
He did a follow up interview with Kieran Woodward about the bin bags at 93 Lancaster Road, but there was nothing new to add to the statement, and no new bags had arrived at the property (MAG 5).
Martin researched 105 Hill Top Road and the ownership of the house, as well as discovering Agnes Montague (MAG 8).
Martin revealed that he was at the Magnus Institute when Trevor Herbert came to the institution (MAG 10).
Martin tried to find Angela related to the Piecemeal case, but found nothing after 3 days (MAG 14).
He looked into the Arachnophobia case and confirmed that Carlos Vittery lived at the flat in Archway (MAG 16).
Martin looked into the fate of Sebastian Adekoya and found that he had been killed in a supposed hit and run (MAG 17).
Martin returned after being imprisoned by Jane Prentiss and reported a statement on the events surrounding his illness (MAG 22).
Martin found a police report on 15th March 2015, police were called to the Hither Green Chapel as there were screams heard after 11pm, although no cause of the noise was found. This concerns Jonathan Sims because this is the same day that Gertrude Robinson passed away (MAG 25).
He called Marcus McKenzie, son of Paul McKenzie, regarding the goings on at his father's house. Marcus confirmed that he had already given a statement (MAG 27).